Hello everyone, I tried to fix ".\Objects\servo motor.axf: Error: L6218E: Undefined symbol assert_param (referred from misc.o)."error but I couldn't solve it.Also as I see others gave message about this problem.They solved this problem with adding STM32F410xR.lib file.But I dont have that file.I have STM32F10x_StdPeriph_Driver file.My servo controlling code's error is here.Can you give advice? *** Using Compiler 'V5.06 update 3 (build 300)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin' Build target 'Target 1' compiling main.c... main.c(14): warning: #1295-D: Deprecated declaration SetupPins - give arg types void SetupPins(); main.c: 1 warning, 0 errors linking... .\Objects\servo motor.axf: Error: L6218E: Undefined symbol assert_param (referred from misc.o). Not enough information to list image symbols. Finished: 1 information, 0 warning and 1 error messages. ".\Objects\servo motor.axf" - 1 Error(s), 1 Warning(s). Target not created. Build Time Elapsed: 00:00:04